Hello,
I've been a system admin for 15 years, professionally. I recently started doing freelancing.
4-5 years ago I worked for a web hosting company, we hosted many youtube like scripts and ffmpeg/avconv was often used for many purposes. I helped some of those clients get what they wanted using ffmpeg/avconv, so I'm confident I can help you too.
P.S.
I'm a PHP programmer too... so that part is covered as well.
Let me know if interested.
Alek